There were too many inevitable factors here.
He chose Freddy for two reasons.
First, with the intelligent programming technology that was centuries ahead of its time, creating a person from scratch would require a lot of effort, and that person must be useful. In this regard, Freddy was undoubtedly the best choice.
Secondly, even for someone as powerful as Harrison Clark, it was extremely difficult to transfer his own memories into a data stream, let alone create a completely new and complete person.
However, the uniqueness of Freddy was that he had already died once from gene collapse and was later revived by fusing with the Gelasians, who could seamlessly connect with the Quantum Network.
